After the death of Conradin, the grandson of the heretic Frederick II, the Empire was thrown into a lawless chaos now called the Interregnum. Men forsook the laws that had governed them and turned to robbery and violence, especially in the region of Southern Swabia (now Switzerland) near the High Rhine and the Aar. Below follows a proximate translation of the history of Count Rudolf IV von Hapsburg, taken from the Chronicon Helveticum (which in turn was taken from earlier sources such as the Chronik der Königsfelden ):
Rudolff Grav von Hapsburg als er einen Priester, der das heilige Sacrament über Feld in tieffen-schlammigten Wege angetroffen…
Then was Rudolf, Count of Hapsburg, riding about in the field with his servants baiting and hunting. Upon his horse he heard the ringing of bells in the distance. Riding on he heard the bells yet clanging earnestly, he sought them, to find what they were.
In the wild of Ow near a tumult of the waters he found a priest with the Most Holy Sacrament, and his sacristan ringing the bells. Then sprang the Count from his horse, kneeling close in reverence for the Sacrament. Now the priest of the abbey was standing at the waterline, and he placed the Sacrament in the wood by the stream, as the bridge was then destroyed by the rising and flooding of the waters. The Count asked the priest what he was doing so far into the wild. The priest answered him, “I carry the Blessed Sacrament to an infirmary where lie many with great disease and now the flood hinders me and the bridge is destroyed.”
Then said the Count, “Take my horse, place the Holy Sacrament in my satchel, and so go to the sick.” Then he guided the horse, which the priest received with great praise and thanksgiving, across the raging torrent, and into the wild.
The next morning the priest returned with the horse and brought it to the Count. Upon seeing him, Rudolf exclaimed “This horse has borne upon it my Creator, never again will I mount it nor any of my servants, for it belongs to the service of God.” The Priest responded saying, “Lord, now humble before God, He will grant to you worthiness in time, and also to you and your descendants eternally, the Crown and Scepter of the Empire, and six other crowns.”
The morning afterwards Count Rudolf rode homebound to the Paar in Klösterli, and so past Zürich and Baden lying on the Linmagt, and to the abbey of Klosterfrow in the wood. And the Friar himself spoke to him saying, “Sir, your hand led God the Almighty before you upon your steed, and so the priest has blessed you and your descendants thence after, knowing indeed that you and your descendants will be in time the Highest, and your name will grow great.”
And afterwards the priest became the Chaplain of the Elector of Mainz, and told him of the virtue of the Count of Hapsburg, so that the Count’s name became great and renowned throughout the whole Empire, that he thereafter became Emperor.